Maximum terminal load (DC-1)
(1)
on 4–6 (NC) (resistive load)
50 V DC, 2 A
Maximum terminal load (DC-13)
(1)
on 4–6 (NC) (inductive load)
24 V DC, 0.1 A
Minimum terminal load on 1–3 (NC), 1–2 (NO), 4–6 (NC), 4–5 (NO)
24 V DC 10 mA, 24 V AC 20 mA
Environment according to EN 60664-1
Overvoltage category III/pollution degree 2
1
IEC 60947 parts 4 and 5. The relay contacts are galvanically isolated from the rest of the circuit by reinforced isolation (PELV).
5.3.12 Control Card Performance
Scan interval
1 ms
5.3.13 Control Characteristics
Resolution of output frequency at 0–590 Hz
±0.003 Hz
Repeat accuracy of precise start/stop (terminals 18, 19)
≤±0.1 ms
System response time (terminals 18, 19, 27, 29, 32, 33)
≤2 ms
Speed control range (open loop)
1:100 of synchronous speed
Speed control range (closed loop)
1:1000 of synchronous speed
Speed accuracy (open loop)
30–4000 RPM: Error ±8 RPM
Speed accuracy (closed loop), depending on resolution of feed-
back device
0–6000 RPM: Error ±0.15 RPM
Torque control accuracy (speed feedback)
Maximum error ±5% of rated torque
All control characteristics are based on a 4-pole asynchronous motor.
AN354546796134en-000201 / 130R0954
34 | Danfoss A/S © 2021.05
Specifications
VLT®AutomationDrive EZ FC 321
Installation Guide